201121200211221 has 12 divisors (see below), whose sum is σ = 291039494279872. Its totient is φ = 133835679844776.

The previous prime is 201121200211103. The next prime is 201121200211241. The reversal of 201121200211221 is 122112002121102.

201121200211221 is a `hidden beast` number, since 2 + 0 + 11 + 21 + 200 + 211 + 221 = 666.

201121200211221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201121200211221 - 2⁷ = 201121200211093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201121200211194 and 201121200211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121200211241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20426686141 + ... + 20426695986.

Almost surely, 2^{201121200211221} is an apocalyptic number.

It is an amenable number.

201121200211221 is a deficient number, since it is larger than the sum of its proper divisors (89918294068651).

201121200211221 is a wasteful number, since it uses less digits than its factorization.

201121200211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40853382680 (or 40853382677 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201121200211221 its reverse (122112002121102), we get a palindrome (323233202332323).

The spelling of 201121200211221 in words is "two hundred one trillion, one hundred twenty-one billion, two hundred million, two hundred eleven thousand, two hundred twenty-one".